Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Numerator:
Net Earnings	$ 5,795	$ 5,059
Denominator:
Basic - Weighted Average Shares Outstanding	18,318,260	18,343,933
Effect of dilutive securities:
Share-based compensation plans	520,912	545,384
Diluted - Weighted Average Shares Outstanding	18,839,172	18,889,317
Basic Earnings per Share	$ 0.32	$ 0.28
Diluted Earnings per Share	$ 0.31	$ 0.27
Anti-dilutive securities excluded from earnings per share calculation	142,168	212,968

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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